When Using an NPC Spawner with a IK-Retargeted Skeletal Mesh, an Instance of the Blueprint is Spawned into the World

Summary

If you use an NPC Spawner in your map with a custom NPC that is IK-Retargeted, whenever you push changes in UEFN an instance of the NPC’s blueprint will appear in the level at position (0, 0, 0).

This happens for both humanoid and wildlife creatures. An additional instance will appear in the map every time you push changes, accumulating over time. This happens per NPC spawner with a custom IK-Retargeted NPC, so you may get an instance of several different NPCs every time changes are pushed.

This is frustrating as it creates unnecessary merge conflicts for our team, and wastes time and memory when they are not deleted.

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Devices

Steps to Reproduce

  1. Have an IK-Retargeted, Custom NPC Definition in your project with a Custom Character Blueprint
  2. Have an NPC Spawner using that Custom NPC
  3. Push Changes
  4. Observe an instance of that blueprint spawns at position (0, 0, 0)

Expected Result

An instance of the custom character blueprint is not spawned into the level

Observed Result

An instance of the custom character blueprint spawns into the level if it is IK-Retargeted

Platform(s)

UEFN

Additional Notes

This happens per NPC spawner with a custom IK-Retargeted NPC, per time you push changes.

FORT-809847 incident has been created. Status is ‘Unconfirmed’.

1 Like

Thank you for the report, this will be fixed in an upcoming update.

2 Likes